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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Switch roles form.
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*
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* @package core_course
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* @copyright 2016 Damyon Wiese
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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require_once($CFG->libdir.'/formslib.php');
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/**
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* Defines the course completion settings form.
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*/
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class switchrole_form extends moodleform {
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/**
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* Determine whether the user is assuming another role
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*
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* This function checks to see if the user is assuming another role by means of
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* role switching. In doing this we compare each RSW key (context path) against
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* the current context path. This ensures that we can provide the switching
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* options against both the course and any page shown under the course.
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*
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* @param context $context
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* @return bool|int The role(int) if the user is in another role, false otherwise
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*/
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protected function in_alternative_role($context) {
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global $USER, $PAGE;
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if (!empty($USER->access['rsw']) && is_array($USER->access['rsw'])) {
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if (!empty($PAGE->context) && !empty($USER->access['rsw'][$PAGE->context->path])) {
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return $USER->access['rsw'][$PAGE->context->path];
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}
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foreach ($USER->access['rsw'] as $key=>$role) {
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if (strpos($context->path, $key)===0) {
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return $role;
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}
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}
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}
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return false;
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}
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/**
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* Defines the form fields.
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*/
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public function definition() {
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global $USER, $CFG, $DB;
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$mform = $this->_form;
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$course = $this->_customdata['course'];
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// Overall criteria aggregation.
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$context = context_course::instance($course->id);
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$roles = array();
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$assumedrole = -1;
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if (is_role_switched($course->id)) {
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$roles[0] = get_string('switchrolereturn');
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$assumedrole = $USER->access['rsw'][$context->path];
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}
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$availableroles = get_switchable_roles($context);
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if (is_array($availableroles)) {
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foreach ($availableroles as $key=>$role) {
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if ($assumedrole == (int)$key) {
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continue;
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}
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$roles[$key] = $role;
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}
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}
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$mform->addElement('select', 'switchrole', get_string('role'), $roles);
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// Add common action buttons.
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$this->add_action_buttons();
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// Add hidden fields.
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$mform->addElement('hidden', 'id', $course->id);
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$mform->setType('id', PARAM_INT);
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}
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}
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